I. Model Analysis

72052: The basic model of the 7200 series two-axis displacement monitoring card

-01: Standard version (standard input/output, standard temperature range, no special options)

II. Product Positioning and Usage

Function: Receives signals from 2 7200 series eddy current probes (such as 72072-01), simultaneously monitoring the forward and reverse axial displacement and shaft misalignment of the rotor; outputs alarm/danger relay contacts to protect the moving and stationary parts of the unit from friction and collision.

Application: Axial displacement protection (ETS) for high-speed rotating machinery such as steam turbines, gas turbines, and large compressors.

Companion: Requires 2×72072-01 (14mm probe) + extension cable for use.

III. Core Technical Parameters

Input: 2 independent eddy current probe inputs (compatible with 14mm 72072 series)

Sensitivity: 7.87 mV/μm (200 mV/mil)

Linear range: 2.54 mm (100 mil) / channel

Output: Gap voltage of each channel -24～0 VDC; 2 alarms + 2 dangerous relay contacts

Power supply: Backplane -24 VDC power supply

Operating temperature: 0℃～+60℃

Structure: Full-size card (Full-size), 7200 series rack installation

Channels: Dual channels (independent monitoring, independent alarm)

IV. Differences from Similar Models of 7200 Series

72052-01: Two-axis displacement card (2 channels of displacement, bidirectional thrust monitoring)

72059-01R: Single-channel vibration preamplifier card (1 channel of shaft vibration/position)

72053-01: Overspeed protection card (speed + three-out-of-two trip)

72072-01: 14mm vibration/position probe (配套 72052/72059)

V. Alternatives and Upgrades

The 7200 series has been discontinued. The mainstream upgrade for axial displacement monitoring is：

3500/42 dual-channel displacement monitor (dual channels， software configuration， 4-20mA output， compatible with 3500 rack)

3300/42 dual-displacement card (transition model， gradually replaced by 3500)